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Getting Started with Camunda & Spring Boot
This tutorial intends to gives you a quick and practical introduction to the open-source workflow and decision automation platform Camunda!
Here you can find the code for this chapter under the git tag chapter-1
.
The easiest way to get started is to download this sample project:
curl -L https://github.com/camunda/camunda-get-started-spring-boot/archive/Step-3.zip \ | bsdtar -xvf - -C .
Which you can then execute with Maven:
cd camunda-get-started-spring-boot-Step-3 && mvn spring-boot:run
Now surf towards localhost:8080 and login via demo & demo:
Taking a closer look into the browser app
Now click on Tasklist
:
From the second column you can see that you have a process running, which is on hold because of the User Task
named Check the request
, which requires that a user takes a look at it and allows further execution:
You can do so by clicking on Complete
from within the first tab:
Adding a Service Task to loanApproval.bpmn
One way to let Camunda execute a own Java function by creating a Service Task
from within the Camunda Modeler (you can install it on Linux by executing support/xdg_register.sh
after extracting the archive), you should see the following view by opening loanApproval.bpmn
with the modeler:
Within block #1 you can set ID
and Name
, block #2 is for pointing to your own Java function. It's most practical name ID
like your Java function:
package org.camunda.bpm.getstarted.loanapproval.delegates;import org.camunda.bpm.engine.delegate.DelegateExecution;import org.springframework.stereotype.Component;@Componentpublic class MainDelegate { public void validateTheRequest(DelegateExecution execution) { System.out.println(" Executing MainDelegate.validateTheRequest"); }}
Now you should see a new item from within your browser:
Switch back to the first tab Form
and click again on Complete
, this time it should go through your own Java function, the Spring terminal proves it:
...2021-11-26 20:19:49.855 INFO 2249 --- [nio-8080-exec-5] o.s.web.servlet.DispatcherServlet : Completed initialization in 5 ms Executing MainDelegate.validateTheRequest
Nice! I think I will add some testing for the next article, stay tuned and happy coding!
Original Link: https://dev.to/tgotwig/getting-started-with-camunda-spring-boot-2gbi
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